Designation:D3525−04(Reapproved2010)StandardTestMethodforGasolineDiluentinUsedGasolineEngineOilsbyGasChromatography1ThisstandardisissuedunderthefixeddesignationD3525;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoverstheuseofgaschromatographytodeterminetheamountofgasolineinusedlubricatingoilsarisingfromtheiruseingasolineengines.1.2Thereisnolimitationforthedeterminationofthedilutionrange,providedthattheamountofsampleplusinternalstandardiswithinthelinearrangeofthegaschro-matographdetector.1.3Thistestmethodislimitedtogaschromatographsequippedwithflameionizationdetectorsandprogrammableovens.NOTE1—Theuseofotherdetectorsandinstrumentationhasbeenreported.However,theprecisionstatementappliesonlywhentheinstru-mentationspecifiedisemployed.1.4Theapplicabilityofthismethodtogelledusedengineoilshasnotbeenadequatelyinvestigatedinordertoensurecompliancewiththeindicatedrepeatabilityandreproducibility.Gelledoilsaredefinedasoilsthatdevelopstructureonstanding,butthatreturntotheiroriginalfluiditywithlightagitation.1.5ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatoryrequirementspriortouse.2.ReferencedDocuments2.1ASTMStandards:2E260PracticeforPackedColumnGasChromatographyE355PracticeforGasChromatographyTermsandRelation-shipsE594PracticeforTestingFlameIonizationDetectorsUsedinGasorSupercriticalFluidChromatographyE1510PracticeforInstallingFusedSilicaOpenTubularCapillaryColumnsinGasChromatographs3.Terminology3.1Definitions:3.1.1Fordefinitionofgaschromatographyterms,refertoPracticeE355.3.2...
